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2008•Dentomaxillofacial RadiologyRequires access

The prevalence of bifid mandibular condyle detected in a Brazilian population

Ana Vitória Ramos Menezes, Flávia Maria de Moraes Ramos, J O de Vasconcelos-Filho, Lúcio Mitsuo Kurita, Solange María de Almeida, Francisco Haiter Neto

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Abstract

OBJECTIVES: To determine the prevalence of bifid mandibular condyle (BMC) detected on panoramic radiographs in a Brazilian population. METHODS: The panoramic radiographs of 50 080 radiographs taken from 1999 to 2006 were retrospectively reviewed in order to identify BMC cases. RESULTS: 9 (0.018%) of the 50 080 patients, 2 men and 7 women, with age ranging from 20 years to 74 years, had BMC. These conditions were unilateral in 7 (78%) subjects and bilateral in 2 (22%) subjects. All patients denied a history of any previous trauma or fracture of the mandible, pain, or trismus. CONCLUSIONS: BMC is an uncommon finding in a group of Brazilian subjects and, although it is rare, dentists should be aware of this condition on routine panoramic radiographs and its implications for function and appropriate treatment modalities.

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What this paper is about

OBJECTIVES: To determine the prevalence of bifid mandibular condyle (BMC) detected on panoramic radiographs in a Brazilian population. METHODS: The panoramic radiographs of 50 080 radiographs taken from 1999 to 2006 were retrospectively reviewed in order to identify BMC cases. RESULTS: 9 (0.018%) of the 50 080 patients, 2 men and 7 women, with age ranging from 20 years to 74 years, had BMC. These conditions were unilateral in 7 (78%) subjects and bilateral in 2 (22%) subjects. All patients denied a history of any previous trauma or fracture of the mandible, pain, or trismus. CONCLUSIONS: BMC is an uncommon finding in a group of Brazilian subjects and, although it is rare, dentists should be aware of this condition on routine panoramic radiographs and its implications for function and appropriate treatment modalities.

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Available abstract

OBJECTIVES: To determine the prevalence of bifid mandibular condyle (BMC) detected on panoramic radiographs in a Brazilian population. METHODS: The panoramic radiographs of 50 080 radiographs taken from 1999 to 2006 were retrospectively reviewed in order to identify BMC cases. RESULTS: 9 (0.018%) of the 50 080 patients, 2 men and 7 women, with age ranging from 20 years to 74 years, had BMC. These conditions were unilateral in 7 (78%) subjects and bilateral in 2 (22%) subjects. All patients denied a history of any previous trauma or fracture of the mandible, pain, or trismus. CONCLUSIONS: BMC is an uncommon finding in a group of Brazilian subjects and, although it is rare, dentists should be aware of this condition on routine panoramic radiographs and its implications for function and appropriate treatment modalities.

Key concepts: Medicine, Condyle, Radiography, Trismus, Mandible (arthropod mouthpart), Population, Dentistry, Orthodontics

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